Chosen Solution
Hello , I have an Surface Pro 4 , i bought the device with the battery allready swollen , so the display was a little bit peeleed off , but was working normal and perfect. I succeded to unstick the display , tried after that to power the unit , worked perfect. Replaced the battery with an second hand one , that from what i head from the pervious owner , the battery stayed for 1 year or more , so probably is empty. After i reattach the battery , no sign of life from the unit. I tried with battery removed same no sign. After that i had read that need to isolate the battery pins from the mainboard , tried even like that , nothing. I had checkd , the diodes , all are fine , the 0ohm resistor is ok , even i have 3.3V on the IC. What else to check ? Could be the battery problem ? The ideea is , i don’t want to spend other money on a new battery to see that will be the same , without life ;) All the answer are appreciated. Thank you
Well, either you have a bad battery board inside the battery, or the data lines are reversed or not contacting (or no data lines at all). Most devices that communicate with the battery need to have the data lines connected in order to work.
@anchefixes one question. If i try to beep this component to ground , beeps on both sides. So these means is shorted to ground ? But i have 3v on them. Is there any chance to be the IC the problem ?
My bad! That was a voltage regulator for the processor! The beeping could be because the internal step-down transformer. The chip is the yellow chip to the left.
